Take-out coffee cups are a popular American import that are filling up the country's trash bins. Now there's an effort in Munich to replace throwaway cups with cups you borrow and return, inspired by the longstanding practice at the city's famous beer gardens.

According to the Environmental Protection Agency, Americans generated 32 million tons of plastic waste in 2012. Much of that gets tossed into landfills, but some of it also finds its way into the ocean — much more than previous estimates of ocean-going trash have previously suggested.

A third of the world’s food spoils in transit and never reaches the table — food that could feed more than the 870 million people on Earth who don't get enough to eat. Improved refrigeration and transportation of perishable foods through a better integrated “cold chain” could combat world hunger and mitigate climate change without the need to grow more food to feed an increasing population.

Dr. Jeff Wilson, an environmental science professor known as Professor Dumpster, is giving "the 1 percent" new meaning: He’s planning to try to live using 1 percent of the energy and water and creating 1 percent of the waste of the average American home — by living in a converted dumpster.

Dr. Jeff Wilson, an environmental science professor known as Professor Dumpster, is giving "the 1 percent" new meaning: He’s planning to try to live using 1 percent of the energy and water and creating 1 percent of the waste of the average American home — by living in a converted dumpster.

A third of the world’s food spoils in transit and never reaches the table — food that could feed more than the 870 million people on Earth who don't get enough to eat. Improved refrigeration and transportation of perishable foods through a better integrated “cold chain” could combat world hunger and mitigate climate change without the need to grow more food to feed an increasing population.

People in the West African country of Senegal have made their living from the sea for generations. But overfishing has put the region's fish stocks in crisis. And the Senegalese are struggling to find a solution. Jori Lewis has this report.

As millions of more Chinese enter the middle class, many are demanding a key passport to that lifestyle: a car. Millions throughout the developing world have the same demand. The world can't sustain this. One possible solution: car sharing.

The Copenhagen conference is supposed to produce a new treaty to address the rising threats from global climate change. Marco Werman speaks with Connie Hedegaard, the Danish Minister for Climate and Energy, who will be chairing the conference next month.